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7 Major Units Of Timekeeping

By BaymaxFalalalala
  • 100

    Sunclock Invention

    Sunclock Invention
  • 500

    Water Clock Invention

    Water Clock Invention
  • Jan 1, 1300

    Hourglass Invention

    Hourglass Invention
  • Jan 1, 1500

    Wristwatch Invention

    Wristwatch Invention

  • Pendulum Clock Invention

    Pendulum Clock Invention

  • Atomic Clock Invention

    Atomic Clock Invention

  • Digital Clock Invention

    Digital Clock Invention